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|
use std;
use rustc;
// -*- rust -*-
import result::{ok, err};
import std::{io, getopts};
import io::writer_util;
import getopts::{opt_present};
import rustc::driver::driver::*;
import rustc::syntax::codemap;
import rustc::driver::diagnostic;
fn version(argv0: str) {
let vers = "unknown version";
let env_vers = #env["CFG_VERSION"];
if str::len(env_vers) != 0u { vers = env_vers; }
io::stdout().write_str(#fmt["%s %s\n", argv0, vers]);
io::stdout().write_str(#fmt["host: %s\n", host_triple()]);
}
fn usage(argv0: str) {
io::stdout().write_str(#fmt["Usage: %s [options] <input>\n", argv0] +
"
Options:
--bin Compile an executable crate (default)
-c Compile and assemble, but do not link
--cfg <cfgspec> Configure the compilation environment
--emit-llvm Produce an LLVM bitcode file
-g Produce debug info
--gc Garbage collect shared data (experimental/temporary)
-h --help Display this message
-L <path> Add a directory to the library search path
--lib Compile a library crate
--ls List the symbols defined by a compiled library crate
--no-asm-comments Do not add comments into the assembly source
--no-lint-ctypes Suppress warnings for possibly incorrect ctype usage
--no-trans Run all passes except translation; no output
--no-verify Suppress LLVM verification step (slight speedup)
(see http://llvm.org/docs/Passes.html for detail)
-O Equivalent to --opt-level=2
-o <filename> Write output to <filename>
--opt-level <lvl> Optimize with possible levels 0-3
--out-dir <dir> Write output to compiler-chosen filename in <dir>
--parse-only Parse only; do not compile, assemble, or link
--pretty [type] Pretty-print the input instead of compiling;
valid types are: normal (un-annotated source),
expanded (crates expanded), typed (crates expanded,
with type annotations), or identified (fully
parenthesized, AST nodes and blocks with IDs)
-S Compile only; do not assemble or link
--save-temps Write intermediate files (.bc, .opt.bc, .o)
in addition to normal output
--static Use or produce static libraries or binaries
--stats Print compilation statistics
--sysroot <path> Override the system root
--test Build a test harness
--target <triple> Target cpu-manufacturer-kernel[-os] to compile for
(default: host triple)
(see http://sources.redhat.com/autobook/autobook/
autobook_17.html for detail)
--time-passes Time the individual phases of the compiler
--time-llvm-passes Time the individual phases of the LLVM backend
-v --version Print version info and exit
--warn-unused-imports
Warn about unnecessary imports
");
}
fn run_compiler(args: [str], demitter: diagnostic::emitter) {
// Don't display log spew by default. Can override with RUST_LOG.
logging::console_off();
let args = args, binary = vec::shift(args);
if vec::len(args) == 0u { usage(binary); ret; }
let match =
alt getopts::getopts(args, opts()) {
ok(m) { m }
err(f) {
early_error(demitter, getopts::fail_str(f))
}
};
if opt_present(match, "h") || opt_present(match, "help") {
usage(binary);
ret;
}
if opt_present(match, "v") || opt_present(match, "version") {
version(binary);
ret;
}
let ifile = alt vec::len(match.free) {
0u { early_error(demitter, "No input filename given.") }
1u { match.free[0] }
_ { early_error(demitter, "Multiple input filenames provided.") }
};
let sopts = build_session_options(match, demitter);
let sess = build_session(sopts, ifile, demitter);
let odir = getopts::opt_maybe_str(match, "out-dir");
let ofile = getopts::opt_maybe_str(match, "o");
let cfg = build_configuration(sess, binary, ifile);
let pretty =
option::map(getopts::opt_default(match, "pretty",
"normal"),
bind parse_pretty(sess, _));
alt pretty {
some::<pp_mode>(ppm) { pretty_print_input(sess, cfg, ifile, ppm); ret; }
none::<pp_mode> {/* continue */ }
}
let ls = opt_present(match, "ls");
if ls {
list_metadata(sess, ifile, io::stdout());
ret;
}
compile_input(sess, cfg, ifile, odir, ofile);
}
/*
This is a sanity check that any failure of the compiler is performed
through the diagnostic module and reported properly - we shouldn't be calling
plain-old-fail on any execution path that might be taken. Since we have
console logging off by default, hitting a plain fail statement would make the
compiler silently exit, which would be terrible.
This method wraps the compiler in a subtask and injects a function into the
diagnostic emitter which records when we hit a fatal error. If the task
fails without recording a fatal error then we've encountered a compiler
bug and need to present an error.
*/
fn monitor(f: fn~(diagnostic::emitter)) {
enum monitor_msg {
fatal,
done,
};
let p = comm::port();
let ch = comm::chan(p);
alt task::try {||
// The 'diagnostics emitter'. Every error, warning, etc. should
// go through this function.
let demitter = fn@(cmsp: option<(codemap::codemap, codemap::span)>,
msg: str, lvl: diagnostic::level) {
if lvl == diagnostic::fatal {
comm::send(ch, fatal);
}
diagnostic::emit(cmsp, msg, lvl);
};
resource finally(ch: comm::chan<monitor_msg>) {
comm::send(ch, done);
}
let _finally = finally(ch);
f(demitter)
} {
result::ok(_) { /* fallthrough */ }
result::err(_) {
// Task failed without emitting a fatal diagnostic
if comm::recv(p) == done {
diagnostic::emit(
none,
diagnostic::ice_msg("unexpected failure"),
diagnostic::error);
let note = "The compiler hit an unexpected failure path. \
This is a bug. Try running with \
RUST_LOG=rustc=0,::rt::backtrace \
to get further details and report the results \
to github.com/mozilla/rust/issues";
diagnostic::emit(none, note, diagnostic::note);
}
// Fail so the process returns a failure code
fail;
}
}
}
fn main(args: [str]) {
monitor {|demitter|
run_compiler(args, demitter);
}
}
// Local Variables:
// mode: rust
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// End:
|
